SMAZ27-TP Equivalent & Substitute Parts

Part Overview

The SMAZ27-TP is a 27 V, 1 W Zener diode manufactured by Micro Commercial Co in Surface Mount DO-214AC (SMAJ) packaging. This component is classified as Active product status and is RoHS3 compliant. The SMAZ27-TP is supplied in Tape & Reel packaging format with 851 pieces currently in stock.

Equivalent and substitute parts are identified when design requirements permit component interchange due to matching or superior electrical and mechanical specifications. Substitution becomes necessary when the primary part reaches end-of-life status, inventory constraints occur, or alternative sourcing is required for supply chain optimization.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	27	V
Tolerance	±5%	—
Power - Maximum	1	W
Impedance (Maximum)	15	Ohms
Current - Reverse Leakage @ Vr	500	nA @ 20.5 V
Voltage - Forward (Maximum) @ If	1.2	V @ 200 mA
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SMAZ27-TP are classified into three categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalent: Parts that maintain identical nominal specifications with allowable parameter variations within the same functional class.

Similar Manufacturer Equivalent: Parts that share the same zener voltage and power rating but may exhibit variations in secondary parameters such as impedance or reverse leakage current.

Parametric Equivalent: Parts from alternative manufacturers that match the primary electrical specifications and operating characteristics.

Substitution eligibility is determined by the following critical parameters:

Voltage - Zener (Nominal): Must equal 27 V
Power - Maximum: Must equal or exceed 1 W
Tolerance: Must be ±5% or tighter
Operating Temperature Range: Must encompass -65°C to 150°C
Package / Case: Must be DO-214AC or SMA compatible
Mounting Type: Must be Surface Mount
RoHS Status: Must be ROHS3 Compliant

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Reverse Leakage @ Vr	Vf (Max) @ If	Temp Range	Package	Packaging Type
SMAZ27-TP	Micro Commercial Co	27 V	±5%	1 W	15 Ω	500 nA @ 20.5 V	1.2 V @ 200 mA	-65 to 150°C	DO-214AC (SMAJ)	Tape & Reel
SMAJ4750A-TP	Micro Commercial Co	27 V	±5%	1 W	35 Ω	5 µA @ 20.6 V	1.2 V @ 100 mA	-65 to 150°C	DO-214AC (SMA)	Tape & Reel
1SMA5935BT3G	onsemi	27 V	±5%	1.5 W	23 Ω	500 nA @ 20.6 V	1.5 V @ 200 mA	-65 to 150°C	DO-214AC (SMA)	Tape & Reel
SML4750-E3/61	Vishay General Semiconductor - Diodes Division	27 V	±10%	1 W	35 Ω	5 µA @ 20.6 V	—	-65 to 150°C	DO-214AC (SMA)	Cut Tape
SML4750A-E3/61	Vishay General Semiconductor - Diodes Division	27 V	±5%	1 W	35 Ω	5 µA @ 20.6 V	—	-65 to 150°C	DO-214AC (SMA)	Cut Tape
SMAZ27-13-F	Diodes Incorporated	27 V	±5%	1 W	15 Ω	500 nA @ 20.5 V	1.2 V @ 200 mA	-65 to 150°C	DO-214AC (SMA)	Cut Tape & Digi-Reel

Engineering Selection Recommendations

SMAJ4750A-TP (Micro Commercial Co): Direct manufacturer equivalent with identical nominal voltage and power specifications. Maintains RoHS3 compliance and unlimited moisture sensitivity rating. Supplied in Tape & Reel format with 7100 pieces in stock. Impedance specification differs at 35 Ohms versus 15 Ohms on the primary part. Reverse leakage current is elevated at 5 µA compared to 500 nA on the SMAZ27-TP.

1SMA5935BT3G (onsemi): Similar manufacturer equivalent with superior power rating of 1.5 W, providing increased thermal margin. Maintains ±5% tolerance and RoHS3 compliance. Reverse leakage current matches the primary part at 500 nA. Supplied in Tape & Reel format with 75300 pieces in stock, indicating strong availability. Forward voltage specification is 1.5 V at 200 mA, compared to 1.2 V on the SMAZ27-TP.

SML4750A-E3/61 (Vishay General Semiconductor - Diodes Division): Parametric equivalent with matching ±5% tolerance and 1 W power rating. Impedance specification is 35 Ohms. Supplied in Cut Tape format with 5800 pieces in stock. Maintains RoHS3 compliance and unlimited moisture sensitivity rating. Operating temperature range extends to 150°C maximum.

SMAZ27-13-F (Diodes Incorporated): Parametric equivalent with identical electrical specifications to the primary part, including 15 Ohms impedance and 500 nA reverse leakage current. Maintains ±5% tolerance and 1 W power rating. Supplied in Cut Tape & Digi-Reel format with 30300 pieces in stock. RoHS3 compliant with unlimited moisture sensitivity rating.

SML4750-E3/61 (Vishay General Semiconductor - Diodes Division): Similar manufacturer equivalent with ±10% tolerance specification, which is wider than the primary part's ±5%. Maintains 1 W power rating and RoHS3 compliance. Supplied in Cut Tape format with 2320 pieces in stock. Impedance specification is 35 Ohms.

Frequently Asked Questions (FAQ)

Q: Can SMAJ4750A-TP be used as a direct replacement for SMAZ27-TP?

A: SMAJ4750A-TP is electrically compatible as a direct substitute. Both parts share identical nominal zener voltage (27 V), tolerance (±5%), power rating (1 W), and operating temperature range (-65°C to 150°C). The primary difference is impedance specification: SMAJ4750A-TP specifies 35 Ohms maximum versus 15 Ohms on SMAZ27-TP. Reverse leakage current is higher at 5 µA on SMAJ4750A-TP compared to 500 nA on SMAZ27-TP. Both are RoHS3 compliant and supplied in Tape & Reel packaging.

Q: What is the advantage of using 1SMA5935BT3G over SMAZ27-TP?

A: The 1SMA5935BT3G provides a higher power rating of 1.5 W compared to 1 W on SMAZ27-TP, offering increased thermal dissipation capability. Both parts maintain identical 27 V nominal zener voltage and ±5% tolerance. The 1SMA5935BT3G exhibits reverse leakage current of 500 nA, matching the SMAZ27-TP specification. Inventory availability is significantly higher at 75300 pieces. The forward voltage specification differs at 1.5 V versus 1.2 V.

Q: Are there tolerance differences between substitute parts?

A: Yes. SMAZ27-TP, SMAJ4750A-TP, 1SMA5935BT3G, and SMAZ27-13-F all specify ±5% tolerance. SML4750-E3/61 specifies ±10% tolerance, which is wider and may not be suitable for applications requiring tighter voltage regulation. SML4750A-E3/61 matches the ±5% tolerance specification.

Q: What packaging format differences exist among substitute parts?

A: SMAZ27-TP and SMAJ4750A-TP are supplied in Tape & Reel (TR) format. 1SMA5935BT3G is supplied in Tape & Reel format. SML4750-E3/61, SML4750A-E3/61 are supplied in Cut Tape (CT) format. SMAZ27-13-F is supplied in Cut Tape & Digi-Reel format. All parts use DO-214AC (SMA) package configuration and are compatible with Surface Mount assembly processes.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts—SMAJ4750A-TP, 1SMA5935BT3G, SML4750-E3/61, SML4750A-E3/61, and SMAZ27-13-F—are RoHS3 compliant. All parts also maintain REACH Unaffected status and carry EAR99 ECCN classification.

Q: Which substitute part has the lowest impedance specification?

A: SMAZ27-TP and SMAZ27-13-F both specify 15 Ohms maximum impedance. All other substitute parts specify 35 Ohms maximum impedance or 23 Ohms for 1SMA5935BT3G.

Q: Can SML4750-E3/61 be used in applications requiring ±5% tolerance?

A: SML4750-E3/61 specifies ±10% tolerance, which exceeds the ±5% tolerance requirement of SMAZ27-TP. This part is not suitable for applications with strict voltage regulation requirements. SML4750A-E3/61 from the same manufacturer provides ±5% tolerance and is the appropriate alternative.

Q: What is the moisture sensitivity level for all substitute parts?

A: SMAZ27-TP, 1SMA5935BT3G, SML4750-E3/61, SML4750A-E3/61, and SMAZ27-13-F all specify Moisture Sensitivity Level (MSL) 1, indicating unlimited moisture sensitivity with no special storage or handling requirements.

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